Flight
Flying into Detroit may be the most cost effective, but it is a hour and a half away from Frankenmuth, MI. Flint Bishop Airport may be more pricy but it is only a half hour away from Frankenmuth, MI. For both options you will need to get a rental vehicle, for there are no transportation shuttles provided from the airports to the hotels in Frankenmuth.
Hotel
Hotel
House Or Rental
We are not familiar with Airbnb options in Frankenmuth. They may be cheaper than a hotel. Might be a better option especially for families or groups. Birch Run is about 15 minutes from downtown Frankenmuth and 15 minutes from the wedding venue.